brinkmann



(No Model.)

3 Sheets-Sheet 2. H. BRINKMANN. SHIFTING 0R REVBRSING GEAR.

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(No Model.) 3- Sheets-Shevet 3. H BRINKMANN SHIPTING OR RBVBRSING GEAR.

Patented July 6, 1897.

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UNITED STATES PATENT )EEICE HEIN RICII BRIN KMAN N OF MUNICH, GERMANY.

SHIFTING OR REVERSING GEAR.

SPECIFICATION forming part of Letters Patent No. 585,649, dated July 6, 1897. Application filed October 20I 1896. Serial No. 609,394. (No model.)

connected to a walking-beamer rock-lever Zt, which is pivoted upon a wrist-pin p, attached to a block movable longitudinally upon a guide-rod g, which is iixedat each end in the framework of the apparatus, as shown.

The air-supplying channels or ports a0 VC .To @ZZ whom t may concern,.-

Be it known that I, HEINRICH BRINKMANN, a citizen of Germany, residing at Munich, Bavaria,Germany, have invented certain new and useful Improvements in Shifting or Reversing Gear; and I d0 hereby declare the following to be a full, clear, and exact ded0 of the two compressed-air cyhndels comscri ption of the invention, such as will enable municate with asingle slide-valve box or chest others skilled in the art to which it appertains 1n the form of apparatus represented both 6o to make and use the same. compressed-air cylinders being controlled by This invention relates to shifting and rea single slide-valve o, operated by a valve versing gear, particularly applicable to enrod t, which is connected to a hand-lever 2 gines operated by fluids; and its object is to by a rod p4, passing through the front o'f\the provide means whereby a point or part of Ieframework, the hand-lever being fulcrumed on a link p3, pivoted to the front of the framework. However, each cylinder may be pro-`\ vided with a separate slide-valve, if desired. If theslide-valve o occupies an intermediate position, as indicated in Fig. 2, the rocklever 7c will be caused to assume the oblique position indicated by broken lines in Fig. l. The pivotal point p will then also occupy an intermediate position. If now the slide-valve o is drawn in the direction of .e by means of the reversing-lever, the piston is reversed in the motive mechanism-may be adjusted to and secured in different positions.

chinery may be the mechanism for the blades of screwpropellers, marine engines in general, and reversible machinery he most various descriptions-such as, for example, conveyers, elevators and hoists for mining and metallurgical purposes, machinery for rolling-mills, steam and street rollers, steam and hydraulic cranes and derricks, and the like.

For these purposes my invention consists in the features, mechanism, and combination of parts set forth in the accompanying speciflcation and particularly pointed out in the claims.

In the accompanying drawings, Figure l represents an elevation or plan of so much of a reversing mechanism embodying my invention as is necessary to fully illustrate the same; Fig. 2, a detail sectional view of the slide-valve box or chest; Fig. 3, a plan of the valve-seat and Fig. 4, a detail sectional view, partly in elevation, of one of the cylinders and pistons. Fi g.-5 is an elevation of a modified form of my invention to be described hereinafter. Figs. 6 and 7 are detail views of the swinging yoke or stop device. Fig. 8 is an elevation showing my invention in one form of its application. Fig. 9 is an end view looking in the direction of the arrow, Fig. 8.

The mechanism thus illustrated consists of two compressed-air cylinders c c', whose piston-rods b are connected with push rods or links b in the manner of pitmen, the free ends of the said push rods or links b' being cupy the position indicated by dot-and-dash 8o lines m n', Fig. l.

It will be readily understood that on reversing the apparatus by moving the slidevalve o in the opposite direction by means of the hand-lever p2 8 5 toward o, the pressure will enter the port do, while the load on the piston will escape through port a0, cylinder c remaining under pressure through the port o0, whereby the rock-lever lo will be caused to assume the position indicated by full lines m n. By this means the machine element, which is connected to the fulcrum jo by suitable means, such as the rod k2, will be shifted to and retained in the desired position.

If the point of attachment of the rod k2 be transferred from the f ulcrum p to a point outside the cylinder, the said point of attachl ment may be given four different positions, f

IOO

` ,ene end of the rock-lever 7c, said yoke being operative position by hand and held until it is engaged by the end of the rock-lever 7s.

lVhat I claim, and desire to secure by Iletters IDatent, is

l. In a shifting-gear, the combination7 with a pair of cylinders, a piston in each cylinder, and a piston-rod connected to each piston, of a walking-beam attached to both piston-rods, a movable pivot on which the walking-beam is fulcrumed, a valve device arranged to control the supply of iuid to the cylinder, and means connected to the walkingbeam for operating the desired mechanism, substantially as set forth.

2; In a shifting-gear, the combination, with a pair of cylinders, a piston in each cylinder, and a piston-rod attached to each piston, of a valve for controlling the supply of fluid to each cylinder, a valve-rod connected to said valve, a guide rod, a pivot-pin movably mounted on the guide-rod, a walking-beam fulcrumed on the pivot-pin and connected to the piston-rods, substantially as set forth.

3. In a shifting-gear, the combination, with a pair of cylinders, a piston in each cylinder, a pistou-rod connected to each piston, of a valve-box provided with a double set of induction and eduction ports and with an exhaust-port, one induction-port and one eduction-port of each set leading to one of the cylinders, and the other induction and eduction port to the other cylinder, a slide-valve movable in the valve-boX and arranged to control the flow of the fluid through the ports, means for operating the slide-valve, a walking-beam connected to the piston-rods, and means connected to the walkin g-beam for shifting the desired mechanism, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

HEINRICH BRIN KM ANN.

whereby the machinery to be shifted may be brought in four different positions also. This form of my invention is illustrated in Figs. 5, S, and El, where the rock-lever 7a is shown as extended at one end, the said extension 7c' being connected by suitable means, such as the rod 7""2, to the mechanism to be shifted. As illustrating one application of my invention I have shown my device connected t0 the link-motion A of a marine engine, it being understood, of course, that the proportions of the link-motion A relative to the shifting mechanism are greatly reduced in order to properly show the two mechanisms on one sheet of the drawings. The rock-lever 7c is shown in one position in full lines in Fig. 5 and in three other positions in dotted lines7 thus illustrating how the connection between the rod h2 and the extension 7o' is brought into four different positions.

In order to shift the rock-lever lo into other positions than will be given to it by the pistous and piston-rods of my improved device, I provide an adjustable stop device J, which is arranged to limit the movement of the rock-lever 7s. This stop device comprises a yoke having ends arranged to contact with carried by a collar which is provided with a hand-wheel and is threaded onto a screw j, pivoted in bearings on the framework of the device, said pivoted end having a shoe pro jecting laterally and engaging a Springsecured on the framework, whereby when the rock-lever 7s is drawn away from the end of the yoke the latter will be swung out of the way ofthe rock-lever by the action of the spring. By turning the hand-wheel the yoke may be adjusted within certain limits to stop the rock-lever at any desired point within thc limit of movement of said yoke, thus giving many new positions of the rock-lever, and onsequently of the rod k2 and the mechanism operated by it. The yoke is made to IVtnesses:

A. M. CICKENBERG,

CARL MAYER.

swing in order that it may be shifted out of the way when not in use. It is swung into 

